synthesis of manganese dioxide (mno2) nanoparticles using supercritical water

Supercritical water, because of its unique properties, can be used as a appropriate environment for conducting a wide range of reactions including the synthesis of different nanoparticles# the main objective of the present work was to synthesize mno2 nanoparticles via supercritical water technique as well as to investigate their properties# structural and morphological properties of synthesized nanoparticles were determined using x-ray diffraction and scanning electron microscopy (sem), respectively# the results demonstrated that the crystalline structure of mno2 was well developed in supercritical water# furthermore, it was found that the spherical fine particles with mean crystalline size of 354 were synthesized in supercritical medium#